Title: Tattered Sky
Genre: YA SF
Civilization has been destroyed by a time travel experiment gone wrong. Now every day the sky rips open to show scenes from lives that have never been, showering the world in radiation. Electronics no longer work, mutations abound, and day-by-day, humanity is dying off.
17-year-old Avilon Dex lives in a disused hunting lodge with her mother and little sister. All they want is to be left alone, but when a group of tyrants kidnaps her sister, Avilon learns there is more to her family that she ever realized. Avilon’s mother admits that the little girl is not her daughter — she might not even be human. She appeared the night the sky tore open, seeming to replace an infant born two nights earlier, dead. With her only help a handsome, mysterious rebel, Avilon must rescue a little girl who might not be her sister, but may be the only hope of saving the world.